CN103390249B - Based on the distribution scheduling aid decision method of various dimensions - Google Patents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The present invention relates to a kind of distribution scheduling aid decision method based on various dimensions, its technical characteristics is: comprise the following steps: 1, energy management system, distribution management system and distribution dispatching supplementary decision system terminal are linked together by dispatching communication network; 2, energy management system obtains current power distribution Running State and circuit real time data information; 3, distribution management system adopts self-adaptive threshold segmentation to process power distribution network running status and track data, sets up and turns for mathematical model of load for turning for carry calculation for power distribution network; 4, in distribution dispatching supplementary decision system terminal, the radar map with five dimensions is generated, for yardman provides aid decision making foundation.The present invention is reasonable in design, adopt power distribution network to turn core algorithm for load, realize the real-time online management of power distribution network, efficiently solve existing grid switching operation with problems such as yardman's experience, efficiency are lower, improve stability and the reliability of electrical network, reduce customer outage hours.
Description
Technical field
The invention belongs to distribution network technical field, especially a kind of distribution scheduling aid decision method based on various dimensions.
Background technology
In recent years, along with the development of power grid construction, electric network composition at different levels is significantly strengthened.But urban power distribution network, no matter from grid structure or management level, compares major network still comparatively weak.At present, power distribution network inner city mostly is cable, and network structure adopts ring network structure, and the more suburb of load accounting mostly is overhead transmission line, and network structure has radiant type, simply connected network or many liaison methods.
Present stage scheduling to the management of distribution mainly by the management of drawing data, the data modification drawing reported according to power distribution work area by yardman, not as the energy management system (EMS) of power transmission network, realizing the application of real-time online, is an off-line system departing from scheduling and produce.Because Distributing network structure is complicated, equipment is numerous, measurement data lacks, make to encounter very large difficulty in distribution safety economy scheduling aspect, yardman can only rely on operating experience to process usually, when being not sure, often take the scheme guarded, take open loop operation, power failure operation mode processes.This mode not only fails to make full use of existing Distribution Network Frame structure, give full play to existing distribution once, the effect of secondary device, further increase the power failure probability to user.
In fact, when load and accident treatment (i.e. load transfer plan) are fallen in distribution, often to consider with or without protecting electric task, Operating Complexity (operating switch least number of times), dual power supply number of users, whether can transship (whether branch current can be out-of-limit), can the problem of five aspects such as cyclization (whether busbar voltage can be out-of-limit), as can not be correctly grasped, not only reduce power supply reliability, even can cause very large impact to the stability of electrical network.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of reasonable in design, distribution scheduling aid decision method based on various dimensions that effectively can improve grid stability is provided.
The present invention solves its technical matters and takes following technical scheme to realize:
Based on a distribution scheduling aid decision method for various dimensions, comprise the following steps:
Step 1: energy management system, distribution management system and distribution dispatching supplementary decision system terminal are linked together by dispatching communication network;
Step 2: energy management system is to distribution real time monitoring and carry out data acquisition, obtains current power distribution Running State and circuit real time data information;
Step 3: distribution management system adopts self-adaptive threshold segmentation to process power distribution network running status and track data, sets up and turns for mathematical model of load for turning for carry calculation for power distribution network;
Step 4: when needs carry out grid switching operation, yardman files an application to distribution management system in distribution dispatching supplementary decision system terminal, distribution management system use power distribution network turns and carries out analytical calculation for mathematical model of load, and in distribution dispatching supplementary decision system terminal, generate the radar map with five dimensions, for yardman provides aid decision making foundation.
And described step 3 adopts self-adaptive threshold segmentation to comprise the following steps the detailed process that power distribution network running status and track data process:
(1) mark off target according to the initial information of network and failure message to turn for region, and search for available interconnection switch, determine failure message;
(2) stochastic generation reference group and initial population, and the adaptive value of computing reference individual in population, as reference target;
(3) according to the evolution selected, expand, mutation operation carries out population, for newly-generated individuality, whether this individuality is feasible solution to use basic tree method to judge, if do not meet topological constraints, then uses correction of infeasible solution method to be feasible solution to its reparation.
(4), when finishing iteration process after Evolution of Population to the algebraically set, export after the decoding of the individuality of adaptive value optimum, as final recovery scheme.
And the treatment scheme of described correction of infeasible solution method is: separate P for one for stochastic generation, if be infeasible solution, become feasible solution by repairing; Construct one with reference to population P
re, each individuality in this population is feasible solution; From P
remiddle random selecting one separates r ∈ P
re, then stochastic generation one is from the random number a between 0 to 1, produces the series of points zi be positioned on p and r line segment according to zi=ap+ (1-a) r, until obtain a zi to meet constraint; Now, if the adaptive value of zi is greater than the adaptive value of r, then zi is replaced r, as P
rein one new for individual, thus p is repaired as feasible solution.
And described step 3 power distribution network turns confession mathematical model of load and is:
In above formula, to gain merit resection sum for each load in dead electricity district for the 1st, d
jfor the weight coefficient of a jth load, depend on the kind of load, P
j, cut is the load of load point excision; 2nd is switch motion total degree; 3rd is voltage out-of-limit penalty term; 4th is the out-of-limit penalty term of power; 5th is power supply reliability reduction number of users;
In above formula:
Wherein, V
jfor jth point voltage amplitude, V
j, maxand V
j, minbe respectively jth point voltage amplitude bound, S
jfor the current applied power of jth bar circuit, S
j, maxfor its power upper limit.λ
p, λ
n, λ
u, λ
s, λ
ilbe respectively every weight coefficient in objective function, value is relevant with the scale of every importance in the target and whole network; Be constrained to topological structure, the constraint of excision load, load controllability and trend accordingly.
And described power distribution network turns to be set up according to following factor for mathematical model of load: with or without guarantor electric task, Operating Complexity, dual power supply number of users, whether can transship, can cyclization factor.
And described radar map comprises protects electric task radar map and load peak radar map.
Advantage of the present invention and good effect are:
1, energy management system (EMS), distribution management system (DMS) and distribution dispatching supplementary decision system terminal are combined by dispatching communication network by this method, power distribution network is adopted to turn the core algorithm supplying load, realize the real-time online management of power distribution network, efficiently solve existing grid switching operation with the problem such as yardman's experience, efficiency is lower, improve stability and the reliability of electrical network, reduce customer outage hours.
2, the core algorithm that the power distribution network that this method adopts turns for load is regarded as a constrained Multiobjective Optimization Problem, consider with or without protecting electric task, Operating Complexity (operating switch least number of times), dual power supply number of users, whether can transship (whether branch current can be out-of-limit), can the problem of cyclization (whether busbar voltage can be out-of-limit) five key elements, and according to different situations, different weight coefficients is arranged to each key element.Such as, when having a major event, when more consideration load importance, load peak, whether more considerations can transship.According to the real-time information of power distribution network current state and line related, utilize self-adaptive threshold segmentation this optimization problem is solved, for yardman provides aid decision making foundation, formulate Optimum Operation scheme.
3, the present invention sends out and adopts the radar map in quality management system to represent five dimensions, intuitively can show the result of decision particularly.
4, the line alignment that the present invention adopts applied geography infosystem (GIS) to realize in figure conforms to actual, and the site information of each Switching Station on cue circuit, handled easily personnel reach the spot fast, greatly improves the efficiency of grid switching operation.
Accompanying drawing explanation
Fig. 1 be the present invention adopt the connection layout of system;
Fig. 2 is the processing flow chart of the self-adaptive threshold segmentation with correction of infeasible solution ability;
Fig. 3 protects electric task radar map having of distribution dispatching supplementary decision system terminal generation;
Fig. 4 is the load peak radar map generated in distribution dispatching supplementary decision system terminal.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
A kind of distribution scheduling aid decision method based on various dimensions, be realize in system as shown in Figure 1, this system comprises energy management system (EMS), distribution management system (DMS) (comprising power distribution network graphics management, Geographic Information System and load transfer plan computing etc.) and multiple stage distribution dispatching supplementary decision system terminal.Energy management system (EMS), distribution management system (DMS) and multiple stage distribution dispatching supplementary decision system terminal are linked together by dispatching communication network.Wherein, energy management system (EMS) as the source of system real time data, acquisition and processing Real-time Electrical Distribution Network Data; Distribution management system (DMS) is the core of native system, inside comprises the functional modules such as power distribution network graphics management, Geographic Information System (GIS) and load transfer plan computing, it not only will manage the basic account data of Distribution Network Equipment, and by obtaining with the interface of energy management system (EMS) real time data that power distribution network runs, be optimized decision analysis, finally obtain optimum grid switching operation scheme; Distribution dispatching supplementary decision system terminal realizes, to the real-time monitoring of distribution and control, screen being provided with the contents such as graphical interfaces, operation interface, feedback interface and alarm interface.
Based on a distribution scheduling aid decision method for various dimensions, comprise the following steps:
Step 1: energy management system, distribution management system and distribution dispatching supplementary decision system terminal are linked together by dispatching communication network, as shown in Figure 1.
Step 2: energy management system (EMS) is to distribution real time monitoring and carry out data acquisition, obtains current power distribution Running State and circuit real time data information, for grid switching operation aid decision making provides effective Data Source.
Step 3: distribution management system adopts self-adaptive threshold segmentation to process power distribution network running status and track data, sets up power distribution network and turns for mathematical model of load for turning for carry calculation.
In this step, distribution management system adopts self-adaptive threshold segmentation to process power distribution network running status and track data.Its concrete processing procedure is:
(1) failure message is determined.First mark off target according to the initial information of network and failure message to turn for region, and search for available interconnection switch.
(2) generating reference colony and initial population.Stochastic generation reference group and initial population, and the adaptive value of computing reference individual in population, as reference target.Initial population is as the first generation population of evolving.In the process that reference group and initial population generate, using basic tree method to judge, whether the topological constraints of each individuality meet, if do not met, regenerate, until reach set population scale.
(3) self-adaptation immunoevolution process.After reference group and initial population generate, carry out the evolution of population according to operations such as selection, expansion, sudden changes, for newly-generated individuality, whether this individuality is feasible solution to use basic tree method to judge, if do not meet topological constraints, then correction of infeasible solution method is used to be feasible solution to its reparation.Before each evolution, parameter each in algorithm is changed according to Evolution of Population result in previous generation.
Self-adaptive threshold segmentation upgrades selection rate, expansion radius etc. according to the antibody mean distance in current population.Suppose that kth is for comprising m antibody v in antibody population Bk
i(i=1,2 ..., m), between antibody, mean distance is:
Various degree of antibody population is defined as:
In formula: d
maxfor given constant.
Selection rate (the α in kth generation
(k)), expansion radius (r
(k)) and sudden change radius (R
(k)) be respectively:
α
(k)=α
0+η
αD
(k)
r
(k)=r
0+η
r(1-D
(k))
R
(k)=R
0+η
R(1-D
(k))
In formula: α
0, r
0and R
0be respectively the minimum value of each parameter; η
α, η
rand η
rrepresent the setting range of relevant parameter respectively.
In antibody population, mean distance is less, and similarity is higher, and various degree is lower, and now selection rate reduces, and expansion radius and sudden change radius increase; Vice versa.Self-adaptive threshold segmentation can according to various degree adjustment parameter of current population to keep the diversity of population.
Due in immunoevolution process, a large amount of infeasible solutions can be produced.If directly give up these solutions, also just give up to fall some special gene comprised in these solutions, thus decreased the diversity of gene in model, thus also just reduced evolutionary rate.If repair this partial solution, make it to become feasible solution, then can accelerated evolutionary process, simultaneously can the diversity of maintainer gene.The present invention adopts the self-adaptive threshold segmentation with correction of infeasible solution ability, and as shown in Figure 2, its treatment scheme is as follows: separate P for one for stochastic generation, if be infeasible solution, becomes feasible solution by repairing; Construct one with reference to population P
re, each individuality in this population is feasible solution; From P
remiddle random selecting one separates r ∈ P
re, then stochastic generation one is from the random number a between 0 to 1, produces the series of points zi be positioned on p and r line segment according to zi=ap+ (1-a) r, until obtain a zi to meet constraint; Now, if the adaptive value of zi is greater than the adaptive value of r, then zi is replaced r, as P
rein one new for individual, thus p is repaired as feasible solution.
(4) terminate to evolve, Output rusults.When finishing iteration process after Evolution of Population to the algebraically set, export after the decoding of the individuality of adaptive value optimum, as final recovery scheme.
This method will turn regards a constrained Multiobjective Optimization Problem as load operation, consider with or without protecting electric task, Operating Complexity (operating switch least number of times), dual power supply number of users, whether can transship (whether branch current can be out-of-limit), can the factor of five aspects such as cyclization (whether busbar voltage can be out-of-limit), set up following power distribution network and turn for mathematical model of load:
In above formula, to gain merit resection sum for each load in dead electricity district for the 1st, d
jfor the weight coefficient of a jth load, depend on the kind of load, P
j, cut is the load of load point excision; 2nd is switch motion total degree; 3rd is voltage out-of-limit penalty term; 4th is the out-of-limit penalty term of power; 5th is power supply reliability reduction number of users.
Wherein:
In formula, V
jfor jth point voltage amplitude, V
j, maxand V
j, minbe respectively jth point voltage amplitude bound, S
jfor the current applied power of jth bar circuit, S
j, maxfor its power upper limit.λ
p, λ
n, λ
u, λ
s, λ
ilbe respectively every weight coefficient in objective function, value is relevant with the scale of every importance in the target and whole network.Be constrained to topological structure, the constraint of excision load, load controllability and trend accordingly.
Step 4: when needs carry out grid switching operation, yardman files an application to distribution management system in distribution dispatching supplementary decision system terminal, distribution management system use power distribution network turns and carries out analytical calculation for mathematical model of load, and in distribution dispatching supplementary decision system terminal, generate the radar map with five dimensions, Fig. 3 and Fig. 4 has provided respectively and has protected electric task radar map and load peak radar map, thus provide aid decision making foundation for yardman, be convenient to formulate Optimum Operation scheme, finally carry out grid switching operation by yardman in terminal or order field staff.
It is emphasized that; embodiment of the present invention is illustrative; instead of it is determinate; therefore the present invention includes the embodiment be not limited to described in embodiment; every other embodiments drawn by those skilled in the art's technical scheme according to the present invention, belong to the scope of protection of the invention equally.
Claims (5)
1., based on a distribution scheduling aid decision method for various dimensions, it is characterized in that: comprise the following steps:
Step 1: energy management system, distribution management system and distribution dispatching supplementary decision system terminal are linked together by dispatching communication network;
Step 2: energy management system is to distribution real time monitoring and carry out data acquisition, obtains current power distribution Running State and circuit real time data information;
Step 3: distribution management system adopts self-adaptive threshold segmentation to process power distribution network running status and track data, sets up power distribution network and turns the mathematical model supplying load, for turning for carry calculation;
Step 4: when needs carry out grid switching operation, yardman files an application to distribution management system in distribution dispatching supplementary decision system terminal, distribution management system use power distribution network turns and carries out analytical calculation for mathematical model of load, and in distribution dispatching supplementary decision system terminal, generate the radar map with five dimensions, for yardman provides aid decision making foundation;
The mathematical model that described step 3 power distribution network turns for load is:
In above formula, to gain merit resection sum for each load in dead electricity district for the 1st, d
jfor the weight coefficient of a jth load, depend on the kind of load, P
j, cutfor the load of load point excision; 2nd is switch motion total degree; 3rd is voltage out-of-limit penalty term; 4th is the out-of-limit penalty term of power; 5th is power supply reliability reduction number of users;
In above formula:
Wherein, V
jfor jth point voltage amplitude, V
j, maxand V
j, minbe respectively jth point voltage amplitude bound, S
jfor the current applied power of jth bar circuit, S
j, maxfor its power upper limit; λ
p, λ
n, λ
u, λ
s, λ
ilbe respectively every weight coefficient in objective function, value is relevant with the scale of every importance in the target and whole network; Be constrained to topological structure, the constraint of excision load, load controllability and trend accordingly.
2. the distribution scheduling aid decision method based on various dimensions according to claim 1, is characterized in that: described step 3 adopts self-adaptive threshold segmentation to comprise the following steps the detailed process that power distribution network running status and track data process:
(1) mark off target according to the initial information of network and failure message to turn for region, and search for available interconnection switch, determine failure message;
(2) stochastic generation reference group and initial population, and the adaptive value of computing reference individual in population, as reference target;
(3) according to the evolution selected, expand, mutation operation carries out population, for newly-generated individuality, whether this individuality is feasible solution to use basic tree method to judge, if do not meet topological constraints, then uses correction of infeasible solution method to be feasible solution to its reparation;
(4), when finishing iteration process after Evolution of Population to the algebraically set, export after the decoding of the individuality of adaptive value optimum, as final recovery scheme.
3. the distribution scheduling aid decision method based on various dimensions according to claim 2, it is characterized in that: the treatment scheme of described correction of infeasible solution method is: separate P for one for stochastic generation, if be infeasible solution, become feasible solution by repairing; Construct one with reference to population P
re, each individuality in this population is feasible solution; From P
remiddle random selecting one separates r ∈ P
re, then stochastic generation one is from the random number a between 0 to 1, produces the series of points zi be positioned on p and r line segment according to zi=ap+ (1-a) r, until obtain a zi to meet constraint; Now, if the adaptive value of zi is greater than the adaptive value of r, then zi is replaced r, as P
rein one new for individual, thus p is repaired as feasible solution.
4. the distribution scheduling aid decision method based on various dimensions according to claim 1, is characterized in that: the mathematical model that described power distribution network turns for load is set up according to following factor: with or without guarantor electric task, Operating Complexity, dual power supply number of users, whether can transship, can cyclization factor.
5. the distribution scheduling aid decision method based on various dimensions according to claim 1, is characterized in that: described radar map comprises protects electric task radar map and load peak radar map.
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